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Related Concept Videos

Aromatic Compounds: Overview01:25

Aromatic Compounds: Overview

11.2K
In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history of organic chemistry, many benzene derivatives were isolated from the pleasant odor oils of the plants. For example, vanillin was isolated from the oil of vanilla, methyl salicylate from the oil of wintergreen, and cinnamaldehyde from the oil of cinnamon. They all had a pleasant odor; hence the name aromatic was given.
In 1825, Faraday...
11.2K
NMR Spectroscopy of Benzene Derivatives01:34

NMR Spectroscopy of Benzene Derivatives

8.6K
Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling...
8.6K
Reactions at the Benzylic Position: Oxidation and Reduction00:59

Reactions at the Benzylic Position: Oxidation and Reduction

3.9K
The benzylic position describes the position of a carbon atom attached directly to a benzene ring. Benzene by itself does not undergo oxidation. In contrast, the benzylic carbon is quite reactive in the presence of strong oxidizing agents such as KMnO4 or H2CrO4. Therefore, alkylbenzenes are readily oxidized to benzoic acid, irrespective of the type of alkyl groups.
3.9K
Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

6.2K
Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
6.2K
Structure of Benzene: Kekulé Model01:07

Structure of Benzene: Kekulé Model

9.5K
In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three assertions—formula of benzene is C6H6, all the hydrogens of benzene are equivalent, and each carbon must have four bonds due to its tetravalency.
He proposed that benzene has a cyclic structure of six carbon atoms attached to one hydrogen atom each, with three alternating pi bonds.
9.5K
Reactions at the Benzylic Position: Halogenation01:11

Reactions at the Benzylic Position: Halogenation

2.7K
Benzylic halogenation takes place under conditions that favor radical reactions such as heat, light, or a free radical initiator like peroxide.
2.7K

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Updated: Aug 10, 2025

Elucidating the Metabolism of 2,4-Dibromophenol in Plants
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Elucidating the Metabolism of 2,4-Dibromophenol in Plants

Published on: February 10, 2023

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Benzophenones in the Environment: Occurrence, Fate and Sample Preparation in the Analysis.

Andromachi A Gavrila1, Ioannis S Dasteridis1, Alkiviadis A Tzimas1

  • 1Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece.

Molecules (Basel, Switzerland)
|February 11, 2023
PubMed
Summary

Emerging contaminants like benzophenones are widespread in the environment and human samples. This review details methods for extracting and analyzing these compounds for environmental monitoring and risk assessment.

Keywords:
analysisbenzophenonesenvironmentextractiontoxicity

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Efficient Synthesis of Polyfunctionalized Benzenes in Water via Persulfate-promoted Benzannulation of &#945;,&#946;-Unsaturated Compounds and Alkynes
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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry

Background:

  • Benzophenones are emerging contaminants found in environmental and human samples.
  • Their environmental persistence and potential adverse effects necessitate monitoring.

Purpose of the Study:

  • To critically review sample preparation methods for benzophenone extraction.
  • To outline techniques for analyzing benzophenones in various environmental matrices.

Main Methods:

  • Review of classical and advanced extraction techniques (e.g., SPE, LLE, SBSE).
  • Discussion of analytical methods, primarily liquid chromatography with various detectors.
  • Focus on sample cleanup to remove interfering substances.

Main Results:

  • Numerous sample preparation methods exist for simple and complex matrices.
  • Analysis is commonly performed using liquid chromatography.
  • Methods are evaluated for efficiency in extracting benzophenones.

Conclusions:

  • Effective sample preparation is crucial for accurate benzophenone determination.
  • Understanding extraction efficiency is key for environmental monitoring.
  • Further research on occurrence, fate, and toxicity is warranted.